CS# 4734867 FI 8.24 System Access Tags Page 1 of 7 Uncontrolled when Printed

Field Instruction

8.24 System Access Tags

Purpose

This instruction outlines the minimum requirements for the application of Horizon Power’s electrical tagging system, by explaining the application and use of the four (4) approved operational tags on Horizon Power’s electrical infrastructure / apparatus.

Scope

This instruction applies to all Horizon Power Workers, including Workers operating, servicing, and/ or maintaining (SPS) Standalone Power Systems electrical equipment (inclusive of all generating methodologies) engaged in the application of System Access Tags on to Horizon Power Generation, Transmission and Distribution electrical apparatus.

Safety

Before commencement of work, a risk assessment must be carried out using the Risk Analysis Procedure (OSH-3.6-1-02), to identify and document the hazards and risks associated with the task and ensure appropriate control measures are implemented.

It is important that, appropriate control measures must be identified, documented and implemented in order to control hazards to As Low as Reasonable Practicable (ALARP).

Training, Authorisation and Permissions

Horizon Power Workers including Workers operating, servicing, and/ or maintaining (MPS) Micro Grid Power Systems electrical equipment (inclusive of all generating methodologies) who intend to work on Horizon Power owned assets, in order to apply System Access Tags, must be trained and authorised as per:

• The Horizon Power Technical Skills Matrix

• The Horizon Power Contractor authorisation process in Field Instruction 1.2 Contractor Authorisation Process.

Tags

Four types of tags are used in the Horizon Power Networks Permit to Work Standard:

• Danger–Do Not Operate tag

• Caution–Vicinity Work in Progress tag

• Danger – Restricted Used tag

• Warning–Out of Service tag

Tags are placed on electrical apparatus to indicate that item’s association with a specific switching program and/or work permit.

All Horizon Power and contractor personnel deemed to be authorised persons shall understand and comply at all times with:

• each tag’s specific application on electrical apparatus and with its relevant work permit

CS# 4734867 FI Danger–Do Not Operate tag Page 2 of 7 Uncontrolled when Printed

Field Instruction

• The information written on the tag.

No unauthorised person shall interfere with a tag that is attached to any electrical apparatus. No person shall in any way add, alter, or remove any information written on the tag.

Danger–Do Not Operate tag

The Danger–Do Not Operate tag is an approved tag attached to electrical apparatus as an instruction against the operation of that electrical apparatus. It is used to protect all parties from inadvertent operation of the apparatus at the isolation points.

Danger–Do Not Operate tags shall only be used in conjunction with switching programs and electrical apparatus access requirements.

Each Danger–Do Not Operate tag shall be securely attached in a prominent position to the electrical apparatus being used as a point of isolation. The electrical apparatus to be worked on must not have a Danger–Do Not Operate tag attached.

Specific information shown on the Danger–Do Not Operate tag is:

• the item of plant to which the Danger tag is attached which makes that item of plant an isolation point

• the ENMAC work permit or switching program number

• the date on which the Danger tag was attached to the item of plant

• The telephone number and name of the person who attached the Danger tag.

Front of Danger–Do Not Operate tag

Figure 1 - Example of a Danger–Do Not Operate tag (front)

This tag is attached to the actual isolation points on the network, they are not attached to the item of plant being worked on.

Note: Danger–Do Not Operate tags must only be removed from primary electrical apparatus by the SO who attached the tag. Where that SO is unavailable to remove the tag, another authorised SO can remove those tags in accordance with Horizon Power's switching operation procedures.

Under no circumstances must a RIC remove a Danger–Do Not Operate tag from a primary point of isolation!

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Field Instruction

Back of Danger–Do Not Operate tag

Figure 2 - Example of a Danger–Do Not Operate tag (back)

All Danger–Do Not Operate tags must have the permit reference number, or more commonly, the Switching Program number recorded.

Caution–Vicinity Work in Progress tag

The Caution–Vicinity Work in Progress tag is used with the VA and its associated switching program. It is attached to apparatus listed on the VA, for example, auto-reclose devices, circuit breakers.

The Caution–Vicinity Work in Progress tag is attached by an appropriately authorised person to the point of control for that protection equipment. Electrical apparatus with a Caution–Vicinity Work in Progress tag attached shall not be operated, altered, or removed by any person other than the SO or for remote operation the RIC who attached the tag. Where that SO or RIC is unavailable, another authorised SO or RIC can operate, alter, or remove that tag in accordance with Horizon Power's switching operation procedures.

Specific information shown on the Caution–Vicinity Work in Progress tag is:

• the ENMAC work permit number

• the RIC of the VA and the date the VA has been issued

• the department and the location of the person who attached the tag

• The telephone number and name of the person who attached the tag.

Front of Caution–Vicinity Work in Progress tag

CS# 4734867 FI Back of Caution–Vicinity Work in Progress tag Page 4 of 7 Uncontrolled when Printed

Field Instruction

Figure 3 - Example of a Caution–Vicinity Work in Progress tag (front)

This tag is attached to remote control points on the network.

Back of Caution–Vicinity Work in Progress tag

Figure 4 - Example of a Caution–Vicinity Work in Progress tag (back)

Danger–Restricted Use tag

The Danger–Restricted Use tag is used with the STT permit. It is attached to apparatus listed on the STT permit. It is used to prevent unauthorised access to the apparatus while the apparatus is being tested.

The Danger–Restricted Use tag shall be attached by the SO. The Danger–Restricted Use tag shall be securely attached in a prominent position to the electrical apparatus being tested.

The Danger–Restricted Use tag shall not altered or removed by any person other than the SO who attached the tag.

• Specific information shown on the Danger–Restricted Use tag is:

• the item of plant to which the tag is attached

• the ENMAC work permit or switching program number

• the SO and his/her authorisation number

• the date the STT has been issued

• The telephone number of the person who attached the tag.

Front of Danger-Restricted use tag

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Field Instruction

Figure 5 - Example of a Danger–Restricted Use tag (front)

Back of Danger-Restricted use tag

Figure 6 - Example of a Danger–Restricted Use tag (back)

Warning–Out of Service tag

The Warning–Out of Service (OOS) tag is attached to any electrical apparatus that is considered unsafe to operate and cannot be immediately restored to an in-service state. Such electrical apparatus shall be considered out of service and will require maintenance, testing, or other operational activities to return it to service.

A Warning–Out of Service tag is applied by the person who initially decides that the electrical apparatus is out of service. The electrical apparatus to which the OOS tag is attached may or may not require operation at the time. If operation is required, the person who applies the OOS tag must be authorised to operate that apparatus.

Once the tag is attached, the person must notify HPCC immediately, with details of the location of that tag and the reason for its attachment.

A Warning–Out of Service tag on electrical apparatus is removed only by the person who rectifies the situation or makes the apparatus ready for service.

Electrical apparatus that only has an OOS tag attached shall not to be considered a point of isolation. Only when that item subsequently has a Danger–Do Not Operate tag attached, will that apparatus be considered a point of isolation.

Warning–Out of Service tag and Danger–Do Not Operate tag

Where a Warning–Out of Service tag and Danger–Do Not Operate tag is attached to the same electrical apparatus, the Warning–Out of Service tag shall be removed before the Danger–Do Not Operate tag is removed. The Warning–Out of Service tag shall not be removed until that apparatus is ready for service

The only exception to this is under emergency switching conditions where the appropriate authority permits the Do Not Operate tag to be removed while the Warning–Out of Service tag is still attached.

Note: Danger–Restricted Use tags shall be initially fitted to and removed from electrical apparatus on completion of the testing by a SO. Where the SO who attached the tag is unavailable to remove the tag, another authorised SO can remove the tag in accordance with Horizon Power's procedures

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Field Instruction

Each Warning–Out of Service tag shall be securely attached in a prominent position to the electrical apparatus.

Specific information shown on the Warning–Out of Service tag is:

• the electrical apparatus covered by the tag

• the reason for attaching the tag

• a reference number, e.g. the apparatus ID number or serial number

• the name of person attaching the tag

• Date tag is fitted and the telephone number of the person attaching the tag.

Front of Warning–Out of Service tag

Figure 7 - Example of a Warning–Out of Service tag (front)

Remember—any item of plant with this tag attached is not be considered a point of isolation, unless it also has a Danger–Do Not Operate tag attached.

Back of Warning–Out of Service tag

CS# 4734867 FI Back of Warning–Out of Service tag Page 7 of 7 Uncontrolled when Printed

Field Instruction

References

• Occupational Safety & Heath Act 1984

• Occupational Safety & Health Regulations 1996

• SHMS OSH-3.6-1-02 Job Risk Analysis (JRA) Procedure

• SHMS OSH-3.6-1-26 Personal Protective Equipment

• Electrical Safety Standard

• Horizon Power Permit to Work Training Manual

• Switching Process and Rules

• Field Instruction 2.6 Worksite Clothing / Personal Protective Equipment Requirements

• Field Instruction 2.23 Job Hazard and Risk Management (JRA)

• Field Instruction 8.6 Switching Authorisation

• Horizon Power Authorisation Application http://dm.horizonpower.com.au/otcs/llisapi.dll/properties/2124191